A vulnerability in the SELinux version of PAM allows a local attackerto brute-force system passwords.

Background==========

PAM (Pluggable Authentication Modules) is an architecture allowing theseparation of the development of privilege granting software from thedevelopment of secure and appropriate authentication schemes. SELinuxis an operating system based on Linux which includes Mandatory AccessControl.

The SELinux patches for PAM introduce a vulnerability allowing apassword to be checked with the unix_chkpwd utility without delay orlogging. This vulnerability doesn't affect users who do not runSELinux.

Impact======

A local attacker could exploit this vulnerability to brute-forcepasswords and escalate privileges on an SELinux system.

This GLSA and any updates to it are available for viewing atthe Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200510-22.xml

Concerns?=========

Security is a primary focus of Gentoo Linux and ensuring theconfidentiality and security of our users machines is of utmostimportance to us. Any security concerns should be addressed tosecurity@gentoo.org or alternatively, you may file a bug athttp://bugs.gentoo.org.